You May Be Interested in these APIs
Related APIs in Category: Extraction
Term Extraction from FiveFilters.org extracts key terms (e.g. for use as tags). Give it a URL to a news article or blog post, or submit your own text, and it will return a list of terms with (hopefully) the most relevant first. Terms can be returned in a variety of formats (JSON, XML, plain text, HTML)
Keyword Extraction API provides professional keyword extractor service which is based on advanced Natural Language Processing and Machine Learning technologies. It can be used to extract topn important keywords from the URL or document that user provided. If you want test our automatic keyword extraction service, you can use our free automatic keyword extractor online demo: http://keywordextraction.net/keyword-extractor
This API allows you to extract most relevant terms from a text. It is not, like many others, a basic TF-IDF analysis. It compare the text against a very large language model, it uses a probabilistic model to identify candidates, it supports multi-words terms and not only single words. It uses part of speech tagging to clean up the results". In short it is probably the most advanced term extraction out there.